added support for describe command

lib/connection.js

@@ -109,6 +109,7 @@ p.parse = function(query) {
   for(var i = 0; i < len; i++) {
     buffer.addInt32(query.types[i]);
   }
+
   this.send('P', buffer.join());
 
   return this;
@@ -163,6 +164,10 @@ p.end = function() {
   this.send('X', Buffer(0));
 };
 
+p.describe = function(msg) {
+  this.send('D',Buffer(msg.type+msg.name+'\0'));
+};
+
 //parsing methods
 p.setBuffer = function(buffer) {
   if(this.lastBuffer) {    //we have unfinished biznaz

test/unit/connection/outbound-sending-tests.js

@@ -155,3 +155,11 @@ test('sends end command', function() {
   var expected = new Buffer([0x58, 0, 0, 0, 4]);
   assert.recieved(stream, expected);
 });
+
+test('sends describe command',function() {
+  test('describe statement', function() {
+    con.describe({type: 's', name: 'bang'});
+    var expected = new BufferList().addChar('s').addCString('bang').join(true, 'D')
+    assert.recieved(stream, expected);
+  });
+});